Master Lock, S4057MT "Danger Do Not Operate Worker in Confined Space" - Metal Detectable Safety Tag

Legend: Do Not Operate Worker in Confined Space
Master Lock
Part #
There is a $100.00 minimum order required when purchasing this product line. Please add $3.52 of eligible items of "Master Lock" to your Shopping Cart. Orders for less than $100.00 of this product are subject to a $15.00 handling fee.
  • This is made-to-order item. Once production has begun, order cannot be canceled even if it is not shipped yet
  • This product is not eligible for return or exchange unless defective
  • Factory lead-time will range from 1 to 3 weeks but usually averages 7 business days before order ships
  • All custom specs and options other than standard ones (including key number, custom stamps or marks, etc.) must be requested before the order is put into production
  • Please review the item's specs and make sure that the product you are purchasing meets your requirements
All sales are final
  • These are made-to-order items.
  • This product is not eligible for return or exchange unless defective.
  • The average lead-time is 1 or 2 weeks.

** This item is BRAND NEW – not refurbished.


Please review and confirm if any custom options listed below are required:

  • Lock Color / Bumper Color / Dial Color / Numbering Color;
  • Size (including Shackle Clearance);
  • Keying Type: Keyed Alike, Keyed Different, Master Keyed;
  • Key Number and/or Master Key Number. Note: If you need new locks to be keyed the same as the ones that you already have, the Key Number that is on your keys currently used should be provided with your order.
  • Keyed Alike in Sets (for KA Locks only);
  • Number of Keyes per Lock;
  • Key Marking.

NOTE: Available options may depend on product type and model. Please request prior to purchasing.